Rice cooker automatic control additional circuit

Working principle of the circuit: As can be seen from the figure, the 220 V mains power supply is C. After step-down current limiting, VD
half-wave rectification, ZD voltage stabilization, and C2 filtering, the circuit obtains a stable 12 V DC
voltage for use by the controller. IC is a CMOS programmable dedicated timing integrated circuit.
When the values ​​of its external timing components RTC and CTC are determined, the timing
time of the IC is determined. AR is the automatic reset terminal. When AR is connected to low level , the IC circuit
will automatically reset when the power is turned on. Q is the output terminal. Q/Q is the output selection terminal, which is used to select
the level of the Q terminal after reset. This mask selects the low level of .